Treatment and reuse of condensate INTEGRALE with IMPROVED: The YARA - - PowerPoint PPT Presentation

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Apr 11, 2023 653 likes •947 views

Treatment and reuse of condensate INTEGRALE with IMPROVED: The YARA case MOBIELE PROCESWATERVOORZIENING VOOR EEN ECONOMISCHE DELTA Paul Van Elslande (Ghent University) OVERVIEW 1. IMPROVED advantages 2. Problem statement stream

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INTEGRALE MOBIELE PROCESWATERVOORZIENING VOOR EEN ECONOMISCHE DELTA

Treatment and reuse of condensate with IMPROVED: The YARA case Paul Van Elslande (Ghent University)

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OVERVIEW

1. IMPROVED advantages
2. Problem statement – stream analysis Yara
3. Technology selection
4. Experiments

➢

Lab scale

➢

From lab to pilot scale

➢

Pilot scale

5. What’s up next?
6. Connect to IMPROVED

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IMPROVED ADVANTAGES WATER TREATMENT: ULTRA-VERSATILE

SOURCE Pretreatment

Treatment

Post-treatment

Mixed bed
AOP

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IMPROVED ADVANTAGES WATER TREATMENT: PLUG & PLAY

Easy plug in from process stream Easy switching between technologies

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IMPROVED ADVANTAGES SENSORING

pH Conductivity Flow Pressure Temperature TOC Sodium Silica DCC Free chlorine

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IMPROVED ADVANTAGES ONLINE

Data logging

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IMPROVED ADVANTAGES ONLINE

Control from distance

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IMPROVED ADVANTAGES MOBILE

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THE YARA CASE

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STREAM ANALYSIS YARA CONDENSATE QUALITY

Condensate 1 (C1) ➢ Aim: Water reuse / nutrient recovery Parameter Average value (mg/L) NH4

15 NO3

Parameter Average value (mg/L) NH4

350 MeOH 300 MDEA 8 TOC 300 Condensate 2 (C2) ➢ Technologies needed that separate selectively separate ions and TOC from the water: Reverse omosis, electrodialysis & membrane distillation / stripping

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TECHNOLOGY SELECTION OVERVIEW

Driving force Membrane Mechanism Reverse osmosis (RO) Pressure difference Dense semi permeable membrane Transport of water Electrodialysis (ED) Electrochemical potential difference Dense ion exchange membrane Transport of ions Membrane distillation (MD) / membrane stripping (MS) Temperature difference / pH difference Porous hydrophobic membrane Transport of volatiles

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EXPERIMENTS LAB SCALE

Condensate 1 (C1) – Rejection / removal efficiencies ➢ Batch experiments → Upscaling needed RO ED MD NH4+ 93% 97% 99% NO3- 86% 92% 99% RO ED MS NH4+ 95% 84% 94% Condensate 2 (C2) – Rejection / removal efficiencies

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EXPERIMENTS FROM LAB TO PILOT SCALE

fOTOS?

RO ED MD

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EXPERIMENTS PILOT SCALE EXPERIMENTS – STREAM C1

Reverse osmosis

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EXPERIMENTS PILOT SCALE EXPERIMENTS – STREAM C1

Reverse osmosis Feed Permeate Rejection (%) Recovery (%) Time (hours) NH4+ (mg/L) NO3- (mg/L) NH4+ (mg/L) NO3- (mg/L) NH4+ NO3- 75 17.8 78.5 0.2 17 99% 78% 22 18.6 82.8 0.5 18.3 97% 78% 49 20 91.3 0.2 17.4 99% 81% 80 3 49.3 191 1.7 15.6 97% 92% 27 40.6 173 0.4 29.5 99% 83% 47 40.5 170 0.8 24.5 98% 86% 85 4 40 158 0.7 19.3 98% 88% 52 25.5 115 0.3 24.1 99% 79%

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EXPERIMENTS PILOT SCALE EXPERIMENTS – STREAM C1

Electrodialysis: Feed & bleed mode

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EXPERIMENTS PILOT SCALE EXPERIMENTS – STREAM C1

Electrodialysis: Continuous mode

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EXPERIMENTS PILOT SCALE EXPERIMENTS – STREAM C1

Electrodialysis: Feed & bleed vs. continuous mode Diluate in Diluate out Removal (%) NH4+ (mg/L) NO3- (mg/L) NH4+ (mg/L) NO3- (mg/L) NH4+ NO3- Feed & bleed 6.2 39 1.2 3.5 81% 91% Continuous 12 57 3.7 16 68% 73%

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EXPERIMENTS PILOT SCALE EXPERIMENTS – STREAM C1

Membrane distillation Feed Permeate Rejection (%) Time (hours) NH4+ (mg/L) NO3- (mg/L) NH4+ (mg/L) NO3- (mg/L) NH4+ NO3- 21.9 107 4.2 12.5 81% 88% 5 31.4 151 2.4 6.5 92% 96% 24 37.8 182 0.6 1.4 98% 99% 26.5 48 232 0.7 0.6 99% 100% 28 48.2 235 1 0.8 98% 100%

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WHAT’S UP NEXT? STREAM C1

➢ Reverse osmosis ➢ Not suitable for this stream due to high fluctuations in product quality ➢ Electrodialysis ➢ Best performer on water production ➢ Decent water quality ➢ Membrane distillation ➢ Best product quality ➢ Fluxes very low RO ED MD Specific electrical energy consumption (kWh/m³) 0.58 0.10 2.78 ➢ Energy requirements needed:

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EXPERIMENTS PILOT SCALE EXPERIMENTS – STREAM C2

Reverse osmosis

Feed RO Permeate Recovery (%) NH4+ (mg/L) MDEA (mg/L) MeOH (mg/L) NH4+ (mg/L) MDEA (mg/L) MeOH (mg/L) 70 1 092 40 994 92 <1 659 75 1 570 20 677 95 <1 677 80 1 398 17 882 86 <1 901 85 1 467 24 959 90 <1 989

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EXPERIMENTS PILOT SCALE EXPERIMENTS – STREAM C2

Electrodialysis Diluate in Diluate out Setting product quality (µS/cm) NH4+ (mg/L) MDEA (mg/L) MeOH (mg/L) NH4+ (mg/L) MDEA (mg/L) MeOH (mg/L) 400 383 13 775 75 2.7 1 115 200 145 2.7 713 45 2 775 100 103 2.7 107 31.1 1.9 863 50 120 <1 1 282 13 <1 1 129 25 65 5 1 061 10 <1 1 193

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EXPERIMENTS PILOT SCALE EXPERIMENTS – STREAM C1

Membrane stripping Feed Permeate time (hours) NH4+ MDEA MeOH NH4+ MDEA MeOH 12 8 960 645 < 1 405 1 29 12 750 1 055 < 1 525 20 3 9 1 040 2 010 < 1 1 415 23 3 7 1 040 2 460 < 1 1 095 25 1 12 1 235 2 610 < 1 1 070 47 3 9 1 030 3 280 < 1 1 015 49 4 9 1 180 3 550 < 1 1 190 51 2 14 955 3 420 < 1 1035 68 37 19 945 3 850 < 1 985 70 5 9 1 175 3 965 < 1 1 085 72 10 7 975 3 920 < 1 1 100

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EXPERIMENTS PILOT SCALE EXPERIMENTS – STREAM C1

Membrane stripping 500 1000 1500 2000 2500 3000 3500 4000 4500 20 40 60 80 Concentration NH4+ (mg/L) Time (hours) Permeate Feed

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WHAT’S UP NEXT? STREAM C2

➢ Reverse osmosis ➢ Selective MDEA removal ➢ No upconcentration of ammonium ➢ Electrodialysis ➢ Partially selective MDEA removal ➢ No upconentration of ammonium ➢ Membrane stripping ➢ Selective MDEA removal ➢ Upconcentration of the ammonium ➢ Extra technique needed for removal of methanol: Cation exchange resin before membrane stripping

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CONNECT TO IMPROVED?

➢ Set-up will be accessible after project ➢ Can be used in other projects at maintenance cost ➢ Solving difficult research questions with regards to

water quality

➢ Testing ground for novel technology

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CONTACT

Arne Verliefde Professor Universiteit Gent Arne.Verliefde@Ugent.be 09/264.60.02